Power supply circuit, power supply chip and electronic equipment

Abstract

The utility model relates to a power supply circuit, a power supply chip and electronic equipment. The power supply circuit comprises a voltage conversion circuit which comprises an input end, an output end and a plurality of inductors, the input end is used for being coupled with a power supply, the output end is used for being coupled with a display driving circuit, and the voltage conversion circuit is used for converting voltage of the power supply and outputting the converted voltage to the display driving circuit to supply power to the display driving circuit; the switching circuit is coupled with at least one inductor, the switching circuit is coupled with the inductor in a one-end coupling or two-end coupling mode, the switching circuit is coupled between the input end and the output end, and the switching circuit is used for controlling the coupled inductor to be connected or disconnected between the power supply and the display driving circuit. Since the inductance affects the efficiency of the power supply circuit when the power supply current required by the display driving circuit is different, the inductance of the power supply circuit is adjusted by changing the number of the inductance between the power supply and the display driving circuit through the switching circuit, thereby improving the efficiency of the power supply circuit.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electronic equipment, and in particular to a power supply circuit, a power supply chip and an electronic equipment. Background Art

[0002] At present, a power supply circuit in an electronic device supplies power to a display driving circuit so as to drive a display panel to display images through the display driving circuit. However, in the process of supplying power to the display driving circuit, the power supply circuit has a problem of low efficiency. Utility Model Content

[0003] In order to overcome the problems existing in the related art, the present disclosure provides a power supply circuit, a power supply chip and an electronic device.

[0004] According to a first aspect of the present disclosure, a power supply circuit is provided, the power supply circuit comprising:

[0005] A voltage conversion circuit, the voltage conversion circuit comprising an input end, an output end and a plurality of inductors, the input end being used to couple with a power supply, the output end being used to couple with a display driving circuit, the voltage conversion circuit being used to convert the voltage of the power supply and output it to the display driving circuit to supply power to the display driving circuit;

[0006] A switch circuit is coupled to at least one of the inductors, the switch circuit is coupled to the inductor in a one-end coupling or a two-end coupling manner, and the switch circuit is coupled between the input end and the output end, and the switch circuit is used to control the coupled inductor to be turned on or off between the power supply and the display driving circuit.

[0007] In some embodiments of the present disclosure, the voltage conversion circuit includes a plurality of inductance branches coupled in parallel, and each of the inductance branches is coupled between the input end and the output end, and each of the inductances is located in one of the inductance branches; the switching circuit includes at least one switching unit, each of the switching units is arranged in one of the inductance branches, and different switching units are located in different inductance branches, and the switching unit is coupled in series with the inductance in the inductance branch where it is located.

[0008] In some embodiments of the present disclosure, there are multiple switch units, and each of the inductor branches includes one switch unit and one inductor.

[0009] In some embodiments of the present disclosure, the multiple inductors include a first inductor and a second inductor, and the multiple switching units include a first transistor and a second transistor; the first inductor is coupled in series with the first transistor to form a first inductor branch in the inductor branch, and the second inductor is coupled in series with the second transistor to form a second inductor branch in the inductor branch.

[0010] In some embodiments of the present disclosure, the voltage conversion circuit includes a boost circuit; or, the voltage conversion circuit includes a buck circuit; or, the voltage conversion circuit includes a buck-boost circuit.

[0011] In some embodiments of the present disclosure, the voltage conversion circuit includes:

[0012] a third transistor, wherein a first terminal of the third transistor is coupled to the first terminal of each of the inductor branches, and a second terminal of the third transistor is used for coupling to a ground terminal;

[0013] a fourth transistor, wherein a first terminal of the fourth transistor is coupled to the first terminal of the third transistor, and a second terminal of the fourth transistor is coupled to the output terminal;

[0014] a first capacitor, wherein a first end of the first capacitor is coupled to the second end of the fourth transistor, and a second end of the first capacitor is used to couple to the ground end;

[0015] Wherein, the second end of each of the inductor branches is coupled to the input end.

[0016] In some embodiments of the present disclosure, the voltage conversion circuit includes:

[0017] a fifth transistor, wherein a first terminal of the fifth transistor is coupled to the input terminal, and a second terminal of the fifth transistor is coupled to the first terminal of each of the inductor branches;

[0018] a sixth transistor, a first terminal of the sixth transistor being coupled to the second terminal of the fifth transistor, and a second terminal of the sixth transistor being coupled to a ground terminal;

[0019] A second capacitor, wherein a first end of the second capacitor is coupled to the second end of each of the inductor branches and the output end, and a second end of the second capacitor is used to couple to the ground end.

[0020] In some embodiments of the present disclosure, the voltage conversion circuit includes:

[0021] a seventh transistor, wherein a first terminal of the seventh transistor is coupled to the input terminal, and a second terminal of the seventh transistor is coupled to the first terminal of each of the inductor branches;

[0022] an eighth transistor, a first terminal of the eighth transistor being coupled to the second terminal of the seventh transistor, and a second terminal of the eighth transistor being coupled to the output terminal;

[0023] A third capacitor, wherein a first end of the third capacitor is coupled to the second end of the eighth transistor, and a second end of the third capacitor is coupled to the second end of each of the inductor branches and a ground end.

[0024] In some embodiments of the present disclosure, each of the inductors is coupled in series between the input end and the output end; the switching circuit includes at least one switching unit, each of the switching units is coupled in parallel with one of the inductors, and different switching units are coupled to different inductors.

[0025] In some embodiments of the present disclosure, the number of the switch units is the same as the number of the inductors; and each of the switch units is coupled in parallel with one of the inductors.

[0026] In some embodiments of the present disclosure, each selection end of the selection switch in the switching circuit is respectively coupled to the first end of one of the inductors, the fixed end of the selection switch is coupled to the input end, and the second end of each of the inductors is coupled to the output end; or, each selection end of the selection switch in the switching circuit is respectively coupled to the first end of one of the inductors, the fixed end of the selection switch is coupled to the output end, and the second end of each of the inductors is coupled to the input end.

[0027] In some embodiments of the present disclosure, the power supply circuit further includes:

[0028] A control circuit is coupled to a control end of the voltage conversion circuit and a control end of the switch circuit.

[0029] According to a second aspect of the present disclosure, a power supply chip is provided, wherein the power supply chip comprises the power supply circuit as described above.

[0030] In some embodiments of the present disclosure, there are multiple power supply circuits; the multiple power supply circuits include a first power supply circuit, a second power supply circuit and a third power supply circuit, the first power supply circuit and the second power supply circuit include a boost circuit, and the third power supply circuit includes a buck-boost circuit.

[0031] According to a third aspect of the present disclosure, an electronic device is provided, comprising the power supply chip as described above.

[0032] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0033] The power supply circuit includes a voltage conversion circuit and a switch circuit. The switch circuit is coupled to at least one inductor in the voltage conversion circuit and is used to control the inductance coupled between the power supply and the display drive circuit. Since the power supply current required by the display drive circuit is different, the size of the inductance affects the efficiency of the power supply circuit. The inductance of the power supply circuit is adjusted by changing the number of inductors coupled between the power supply and the display drive circuit through the switch circuit, thereby improving the efficiency of the power supply circuit. At the same time, since the efficiency of the power supply circuit is improved, the power consumed by the power supply circuit is reduced, thereby extending the battery life of the electronic device.

[0034] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0036] Figure 1 is a structural schematic diagram of a power supply circuit provided by an exemplary embodiment of the present disclosure;

[0037] Figure 2 is a structural schematic diagram of a power supply circuit provided by another exemplary embodiment of the present disclosure;

[0038] Figure 3 is a structural schematic diagram of a power supply circuit provided by another exemplary embodiment of the present disclosure;

[0039] Figure 4 is a structural schematic diagram of a power supply circuit provided by another exemplary embodiment of the present disclosure;

[0040] Figure 5 is a structural schematic diagram of a power supply circuit provided by another exemplary embodiment of the present disclosure;

[0041] Figure 6 is a structural schematic diagram of a power supply circuit provided by another exemplary embodiment of the present disclosure;

[0042] Figure 7 is a structural schematic diagram of a power supply circuit provided by another exemplary embodiment of the present disclosure;

[0043] Figure 8 is a structural schematic diagram of a power supply circuit provided by another exemplary embodiment of the present disclosure;

[0044] Fig. 9 is a structural schematic diagram of a power supply circuit provided by another exemplary embodiment of the present disclosure;

[0045] Fig.10is a structural schematic diagram of a power supply circuit provided by another exemplary embodiment of the present disclosure;

[0046] Fig.11 is a structural schematic diagram of a power supply circuit provided by another exemplary embodiment of the present disclosure;

[0047] Fig.12 is a structural schematic diagram of a power supply circuit provided by another exemplary embodiment of the present disclosure;

[0048] Fig.13 is a schematic diagram of an efficiency curve of a power supply circuit provided by an exemplary embodiment of the present disclosure;

[0049] Fig.14 is a schematic diagram of an efficiency curve of a power supply circuit provided by another exemplary embodiment of the present disclosure;

[0050] Fig.15 is a system block diagram of an electronic device provided by an exemplary embodiment of the present disclosure.

[0051] In the figure:

[0052] 10-voltage conversion circuit; 20-switching circuit; 21-switching unit; 30-power supply; 40-display driving circuit; 50-control circuit; L-inductor; L1-first inductor; L2-second inductor; L3-third inductor; L4-fourth inductor; C1-first capacitor; C2-second capacitor; C3-third capacitor; C4-fourth capacitor; C5-fifth capacitor; C6-sixth capacitor; C7-seventh capacitor; C8-eighth capacitor; C9-ninth capacitor; T1-first transistor; T2-second transistor; T3-third transistor; T4-fourth transistor; T5-fifth transistor; T6-sixth transistor; T7-seventh transistor; T8-eighth transistor body tube; T9-ninth transistor; T10-tenth transistor; D1-first diode; D2-second diode; D3-third diode; D4-fourth diode; D5-fifth diode; D6-sixth diode; D7-seventh diode; D8-eighth diode; D9-ninth diode; D10-tenth diode; VIN-input terminal; VOUT-output terminal; GND-ground terminal; 400-electronic device; 402-processing component; 404-memory; 406-power supply component; 408-multimedia component; 410-audio component; 412-input and output interface; 414-sensor component; 416-communication component; 420-processor. DETAILED DESCRIPTION

[0053] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims. It should also be understood that the term "and / or" as used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0054] At present, with the development of display panel technology, the resolution and brightness of display panels are constantly improving to make the displayed images clearer. The power supply circuit in the electronic device supplies power to the display driving circuit to drive the display panel to display the image through the display driving circuit. However, in the process of supplying power to the display driving circuit, since the current required by the display driving circuit will change according to the image displayed by the display panel, the power supply circuit has the problem of low efficiency under different output currents.

[0055] Based on this, the present disclosure provides a power supply circuit. When the current required by the display driving circuit is different, the number of inductors coupled between the power supply and the display driving circuit is changed through a switch circuit to adjust the inductance of the power supply circuit so that the inductance of the power supply circuit corresponds to the output current to improve the efficiency of the power supply circuit. At the same time, since the efficiency of the power supply circuit is improved, the power consumed by the power supply circuit is reduced, thereby extending the battery life of the electronic device.

[0056] An exemplary embodiment of the present disclosure provides a power supply circuit, such as Figure 1 As shown, the power supply circuit includes a voltage conversion circuit 10 and a switch circuit 20. The voltage conversion circuit 10 includes an input terminal VIN, an output terminal VOUT and a plurality of inductors L. The input terminal VIN is used to couple with a power supply 30, and the output terminal VOUT is used to couple with a display driving circuit 40. The voltage conversion circuit 10 is used to convert the voltage of the power supply 30 and output it to the display driving circuit 40 to supply power to the display driving circuit 40. The switch circuit 20 is coupled to at least one inductor L. The switch circuit 20 is coupled to the inductor L in a one-end coupling or two-end coupling manner, and the switch circuit 20 is coupled between the input terminal VIN and the output terminal VOUT. The switch circuit 20 is used to control the coupled inductor L to be turned on and off between the power supply 30 and the display driving circuit 40.

[0057] In this embodiment, the power supply circuit includes a voltage conversion circuit and a switch circuit. The switch circuit is coupled to at least one inductor in the voltage conversion circuit and is used to control the inductance coupled between the power supply and the display drive circuit. Since the size of the inductance affects the efficiency of the power supply circuit when the power supply current required by the display drive circuit is different, the size of the inductance of the power supply circuit is adjusted by changing the number of inductors coupled between the power supply and the display drive circuit through the switch circuit, thereby improving the efficiency of the power supply circuit. At the same time, since the efficiency of the power supply circuit is improved, the power consumed by the power supply circuit is reduced, thereby extending the battery life of the electronic device.

[0058] Exemplarily, the switch circuit 20 may be an integrated switch module or a separate switch device.

[0059] Exemplarily, the display driving circuit 40 may be a display driver chip (Display Driver IC, DDIC).

[0060] In one embodiment, if Figure 2 As shown, the voltage conversion circuit 10 includes a plurality of inductance branches coupled in parallel, and each inductance branch is coupled between the input terminal VIN and the output terminal VOUT, and each inductance L is located in an inductance branch. The switch circuit 20 includes at least one switch unit 21, each switch unit 21 is arranged in an inductance branch, and different switch units 21 are located in different inductance branches, and the switch unit 21 is coupled in series with the inductance L in the inductance branch where it is located.

[0061] In this embodiment, since the switch circuit includes at least one switch unit and the switch unit is coupled in series with the inductor, the switch unit is coupled in series with the inductor in at least one inductor branch. By turning on the switch unit, the inductor coupled in series with the switch unit can be connected between the power supply and the display drive circuit. By turning off the switch unit, the inductor coupled in series with the switch unit can be disconnected from the power supply and the display drive circuit. By turning on or off the switch unit, the number of inductors coupled between the power supply and the display drive circuit is changed, thereby improving the efficiency of the power supply circuit and reducing the complexity of the power supply circuit control.

[0062] Exemplarily, the number of the switch unit 21 may be one. When the number of the switch unit 21 is one, the switch unit 21 may only adjust whether the inductor L coupled in series with the switch unit 21 is coupled between the power supply 30 and the display driving circuit 40. Since the number of the switch units 21 is small, the volume of the power supply circuit and the complexity of the power supply circuit control can be reduced.

[0063] In one embodiment, there are multiple switch units 21 , and each inductor branch includes a switch unit 21 and an inductor L.

[0064] In this embodiment, each inductor branch includes a switch unit and an inductor coupled in series. Since each inductor is adjusted by the corresponding switch unit to be coupled between the power supply and the display driving circuit, the number of inductors coupled between the power supply and the display driving circuit is precisely controlled, thereby improving the efficiency of the power supply circuit. Moreover, when the power supply circuit needs to be powered off, in addition to being powered off by the voltage conversion circuit, the power supply circuit can also be powered off twice by disconnecting all the switch units to improve the reliability of the power supply circuit.

[0065] Exemplarily, the number of inductors L can be set to 3, 4, 5, 6, etc., and the number of switch units 21 can be set to 3, 4, 5, 6, etc. correspondingly.

[0066] It is understandable that, in addition to each inductor branch including a switch unit 21 and an inductor L, some inductor branches may include the switch unit 21 and some inductor branches may not include the switch unit 21, which is not limited here.

[0067] In one embodiment, if Figure 3 As shown, the plurality of inductors L include a first inductor L1 and a second inductor L2, and the plurality of switch units 21 include a first transistor T1 and a second transistor T2. The first inductor L1 is coupled in series with the first transistor T1 to form a first inductor branch in the inductor branch, and the second inductor L2 is coupled in series with the second transistor T2 to form a second inductor branch in the inductor branch.

[0068] In this embodiment, by coupling the first inductor branch and the second inductor branch in parallel, the two inductors in the voltage conversion circuit can provide three inductances to the power supply circuit to adjust the inductance, thereby improving the efficiency of the power supply circuit. At the same time, since the inductance in the power supply circuit can be changed with fewer inductors and transistors, and the efficiency of the power supply circuit can be greatly improved, the complexity of the power supply circuit structure and control is reduced.

[0069] Exemplarily, when the first transistor T1 is turned on and the second transistor T2 is turned off, the first inductor L1 is coupled between the power supply 30 and the display driving circuit 40, and the inductance of the power supply circuit is equal to the inductance value L of the first inductor L1. 1 When the first transistor T1 is turned off and the second transistor T2 is turned on, the second inductor L2 is coupled between the power supply 30 and the display driving circuit 40, and the inductance of the power supply circuit is equal to the inductance value L of the second inductor L2. 2 When the first transistor T1 and the second transistor T2 are both turned on, the first inductor L1 and the second inductor L2 are both coupled between the power supply 30 and the display driving circuit 40, and the inductance of the power supply circuit is the inductance value L of the first inductor L1 and the second inductor L2 in parallel. 1 *L2 / (L 1 +L 2 ).

[0070] In one embodiment, the voltage conversion circuit 10 includes a boost circuit.

[0071] In this embodiment, the number of inductors coupled between the power supply and the display driving circuit is adjusted by the switch circuit, so that the efficiency of the power supply circuit can be improved when the power supply circuit boosts the voltage to supply power to the display driving circuit.

[0072] Exemplarily, the voltage boosting circuit may be a Boost circuit.

[0073] In one embodiment, if Figure 4 As shown, the voltage conversion circuit 10 includes a third transistor T3, a fourth transistor T4 and a first capacitor C1. The first end of the third transistor T3 is coupled to the first end of each inductor branch, and the second end of the third transistor T3 is used to couple with the ground terminal GND. The first end of the fourth transistor T4 is coupled to the first end of the third transistor T3, and the second end of the fourth transistor T4 is coupled to the output terminal VOUT. The first end of the first capacitor C1 is coupled to the second end of the fourth transistor T4, and the second end of the first capacitor C1 is used to couple with the ground terminal GND. Among them, the second end of each inductor branch is coupled to the input terminal VIN. The multiple switch units 21 may include, for example, a first transistor T1 and a second transistor T2. The multiple inductors L may include, for example, a first inductor L1 and a second inductor L2.

[0074] In this embodiment, the third transistor and the fourth transistor can be matched with the inductor to play a role of boosting, and the voltage input by the power supply can be boosted through the input end to supply power to the display driving circuit through the output end. By changing the number of inductors connected to the boosting circuit through the switch circuit, the inductance of the boosting circuit can be adjusted when the third transistor and the fourth transistor boost the input voltage to supply power to the display driving circuit, thereby improving the efficiency of the power supply circuit.

[0075] Exemplarily, the voltage conversion circuit 10 may further include a fourth capacitor C4 and a fifth capacitor C5. A first end of the fourth capacitor C4 is coupled to the input terminal VIN, and a second end of the fourth capacitor C4 is coupled to a second end of the third transistor T3. A first end of the fifth capacitor C5 is coupled to a first end of the first capacitor C1, and a second end of the fifth capacitor C5 is coupled to a second end of the first capacitor C1.

[0076] In one embodiment, the voltage conversion circuit 10 includes a step-down circuit.

[0077] In this embodiment, the number of inductors coupled between the power supply and the display driving circuit is adjusted by the switch circuit, so that the efficiency of the power supply circuit can be improved when the power supply circuit steps down the voltage to supply power to the display driving circuit.

[0078] Exemplarily, the step-down circuit may be a Buck circuit.

[0079] In one embodiment, if Figure 5 As shown, the voltage conversion circuit 10 includes a fifth transistor T5, a sixth transistor T6 and a second capacitor C2. The first end of the fifth transistor T5 is coupled to the input terminal VIN, and the second end of the fifth transistor T5 is coupled to the first end of each inductor branch. The first end of the sixth transistor T6 is coupled to the second end of the fifth transistor T5, and the second end of the sixth transistor T6 is used to couple to the ground terminal GND. The first end of the second capacitor C2 is coupled to the second end of each inductor branch and the output terminal VOUT, and the second end of the second capacitor C2 is used to couple to the ground terminal GND. The multiple switch units 21 may include, for example, a first transistor T1 and a second transistor T2. The multiple inductors L may include, for example, a first inductor L1 and a second inductor L2.

[0080] In this embodiment, the fifth transistor and the sixth transistor can play a role of voltage reduction in combination with the inductor, and the voltage input by the power supply can be reduced through the input end to supply power to the display driving circuit through the output end. By changing the number of inductors connected to the voltage reduction circuit through the switch circuit, the inductance of the voltage reduction circuit can be adjusted when the fifth transistor and the sixth transistor reduce the input voltage to supply power to the display driving circuit, thereby improving the efficiency of the power supply circuit.

[0081] Exemplarily, the voltage conversion circuit 10 may further include a sixth capacitor C6 and a seventh capacitor C7. A first end of the sixth capacitor C6 is coupled to the input terminal VIN, and a second end of the sixth capacitor C6 is used to couple to the ground terminal GND. A first end of the seventh capacitor C7 is coupled to a first end of the second capacitor C2, and a second end of the seventh capacitor C7 is coupled to a second end of the second capacitor C2.

[0082] In one embodiment, the voltage conversion circuit 10 includes a buck-boost circuit.

[0083] In this embodiment, the number of inductors coupled between the power supply and the display driving circuit is adjusted by the switch circuit, so that the efficiency of the power supply circuit can be improved when the power supply circuit boosts or bucks the display driving circuit.

[0084] Exemplarily, the step-up and step-down circuit may be a Buck-Boost circuit.

[0085] In one embodiment, if Figure 6As shown, the voltage conversion circuit 10 includes a seventh transistor T7, an eighth transistor T8 and a third capacitor C3. The first end of the seventh transistor T7 is coupled to the input terminal VIN, and the second end of the seventh transistor T7 is coupled to the first end of each inductor branch. The first end of the eighth transistor T8 is coupled to the second end of the seventh transistor T7, and the second end of the eighth transistor T8 is coupled to the output terminal VOUT. The first end of the third capacitor C3 is coupled to the second end of the eighth transistor T8, and the second end of the third capacitor C3 is coupled to the second end of each inductor branch and the ground terminal GND. The plurality of switch units 21 may include, for example, a first transistor T1 and a second transistor T2. The plurality of inductors L may include, for example, a first inductor L1 and a second inductor L2.

[0086] In this embodiment, the seventh transistor and the eighth transistor can play a role of stepping up and down in combination with the inductor, and can step up or down the voltage input by the power supply through the input end to power the display driving circuit through the output end. By changing the number of inductors connected to the step-up circuit through the switch circuit, the seventh transistor and the eighth transistor can adjust the inductance of the step-up and step-down circuit when stepping up or down the input voltage to power the display driving circuit, thereby improving the efficiency of the power supply circuit.

[0087] Exemplarily, the voltage conversion circuit 10 may further include an eighth capacitor C8 and a ninth capacitor C9. The first end of the eighth capacitor C8 is coupled to the input terminal VIN, and the second end of the eighth capacitor C8 is used to couple to the ground terminal GND. The first end of the ninth capacitor C9 is coupled to the first end of the third capacitor C3, and the second end of the ninth capacitor C9 is coupled to the second end of the third capacitor C3.

[0088] In one embodiment, if Figure 7 As shown, each inductor L is coupled in series between the input terminal VIN and the output terminal VOUT. The switch circuit 20 includes at least one switch unit 21, each switch unit 21 is coupled in parallel with an inductor L, and different switch units 21 are coupled with different inductors L.

[0089] In this embodiment, since the switch circuit includes at least one switch unit and the switch unit is coupled in parallel with the inductor, the switch unit is coupled in parallel with at least one inductor. By turning on the switch unit, the inductor coupled in parallel with the switch unit can be disconnected from the power supply and the display drive circuit. By turning off the switch unit, the inductor coupled in parallel with the switch unit can be connected between the power supply and the display drive circuit. By turning on or off the switch unit, the number of inductors coupled between the power supply and the display drive circuit is changed, thereby improving the efficiency of the power supply circuit and reducing the complexity of the power supply circuit control.

[0090] Exemplarily, the number of the switch unit 21 may be one. When the number of the switch unit 21 is one, the switch unit 21 may only adjust whether the inductor L coupled in parallel with the switch unit 21 is coupled between the power supply 30 and the display driving circuit 40. Since the number of the switch units 21 is small, the volume of the power supply circuit and the complexity of the power supply circuit control can be reduced.

[0091] In one embodiment, the number of the switch units 21 is the same as the number of the inductors L. Each switch unit 21 is coupled to an inductor L in parallel.

[0092] In this embodiment, since each inductor is adjusted by a corresponding switch unit to determine whether it is coupled between the power supply and the display driving circuit, precise control of the number of inductors coupled between the power supply and the display driving circuit is achieved, thereby improving the efficiency of the power supply circuit.

[0093] Exemplarily, the number of inductors L can be set to 3, 4, 5, 6, etc., and the number of switch units 21 can be set to 3, 4, 5, 6, etc. correspondingly.

[0094] In one embodiment, if Figure 8 As shown, the plurality of inductors include a third inductor L3 and a fourth inductor L4, and the plurality of switch units 21 include a ninth transistor T9 and a tenth transistor T10. The third inductor L3 and the fourth inductor L4 are connected in series, the ninth transistor T9 is coupled in parallel with the third inductor L3, and the tenth transistor T10 is coupled in parallel with the fourth inductor L4.

[0095] In this embodiment, the third inductor and the fourth inductor are coupled in series, so that the two inductors in the voltage conversion circuit can provide three inductances to the power supply circuit to adjust the inductance, thereby improving the efficiency of the power supply circuit. At the same time, since the inductance in the power supply circuit can be changed with fewer inductors and transistors, and the efficiency of the power supply circuit can be greatly improved, the complexity of the power supply circuit structure and control is reduced.

[0096] Exemplarily, when the ninth transistor T9 is turned on and the tenth transistor T10 is turned off, the fourth inductor L4 is coupled between the power supply 30 and the display driving circuit 40, and the inductance of the power supply circuit is equal to the inductance value L of the fourth inductor L4. 4 When the ninth transistor T9 is turned off and the tenth transistor T10 is turned on, the third inductor L3 is coupled between the power supply 30 and the display driving circuit 40, and the inductance of the power supply circuit is equal to the inductance value L of the third inductor L3. 3 When the ninth transistor T9 and the tenth transistor T10 are both turned off, the third inductor L3 and the fourth inductor L4 are coupled between the power supply 30 and the display driving circuit 40, and the inductance of the power supply circuit is L3 +L 4 .

[0097] In one embodiment, if Fig. 9 As shown, the voltage conversion circuit 10 includes a third transistor T3, a fourth transistor T4 and a first capacitor C1. The first end of the third transistor T3 is coupled to the lead-out end of the first inductor L in series, and the second end of the third transistor T3 is used to couple with the ground terminal GND. The first end of the fourth transistor T4 is coupled to the first end of the third transistor T3, and the second end of the fourth transistor T4 is coupled to the output terminal VOUT. The first end of the first capacitor C1 is coupled to the second end of the fourth transistor T4, and the second end of the first capacitor C1 is used to couple with the ground terminal GND. Among them, the lead-out end of the last inductor L in series is coupled with the input terminal VIN. The plurality of switch units 21 may include, for example, a ninth transistor T9 and a tenth transistor T10. The plurality of inductors L may include, for example, a third inductor L3 and a fourth inductor L4.

[0098] In this embodiment, the third transistor and the fourth transistor can be matched with the inductor to play a role of boosting, and the voltage input by the power supply can be boosted through the input end to supply power to the display driving circuit through the output end. By changing the number of inductors connected to the boosting circuit through the switch circuit, the inductance of the boosting circuit can be adjusted when the third transistor and the fourth transistor boost the input voltage to supply power to the display driving circuit, thereby improving the efficiency of the power supply circuit.

[0099] Exemplarily, the voltage conversion circuit 10 may further include a fourth capacitor C4 and a fifth capacitor C5. A first end of the fourth capacitor C4 is coupled to the input terminal VIN, and a second end of the fourth capacitor C4 is coupled to a second end of the third transistor T3. A first end of the fifth capacitor C5 is coupled to a first end of the first capacitor C1, and a second end of the fifth capacitor C5 is coupled to a second end of the first capacitor C1.

[0100] In one embodiment, if Fig.10 As shown, the voltage conversion circuit 10 includes a fifth transistor T5, a sixth transistor T6 and a second capacitor C2. The first end of the fifth transistor T5 is coupled to the input terminal VIN, and the second end of the fifth transistor T5 is used to couple with the lead-out terminal of the first inductor L in series. The first end of the sixth transistor T6 is coupled to the second end of the fifth transistor T5, and the second end of the sixth transistor T6 is used to couple with the ground terminal GND. The first end of the second capacitor C2 is coupled to the lead-out terminal of the last inductor L in series and the output terminal VOUT, and the second end of the second capacitor C2 is used to couple with the ground terminal GND. The plurality of switch units 21 may include, for example, a ninth transistor T9 and a tenth transistor T10. The plurality of inductors L may include, for example, a third inductor L3 and a fourth inductor L4.

[0101] In this embodiment, the fifth transistor and the sixth transistor can play a role of voltage reduction in combination with the inductor, and the voltage input by the power supply can be reduced through the input end to supply power to the display driving circuit through the output end. By changing the number of inductors connected to the voltage reduction circuit through the switch circuit, the inductance of the voltage reduction circuit can be adjusted when the fifth transistor and the sixth transistor reduce the input voltage to supply power to the display driving circuit, thereby improving the efficiency of the power supply circuit.

[0102] Exemplarily, the voltage conversion circuit 10 may further include a sixth capacitor C6 and a seventh capacitor C7. A first end of the sixth capacitor C6 is coupled to the input terminal VIN, and a second end of the sixth capacitor C6 is used to couple to the ground terminal GND. A first end of the seventh capacitor C7 is coupled to a first end of the second capacitor C2, and a second end of the seventh capacitor C7 is coupled to a second end of the second capacitor C2.

[0103] In one embodiment, if Fig.11 As shown, the voltage conversion circuit 10 includes a seventh transistor T7, an eighth transistor T8 and a third capacitor C3. The first end of the seventh transistor T7 is coupled to the input terminal VIN, and the second end of the seventh transistor T7 is coupled to the lead-out terminal of the first inductor L in series. The first end of the eighth transistor T8 is coupled to the second end of the seventh transistor T7, and the second end of the eighth transistor T8 is coupled to the output terminal VOUT. The first end of the third capacitor C3 is coupled to the second end of the eighth transistor T8, and the second end of the third capacitor C3 is coupled to the lead-out terminal of the last inductor L in series and the ground terminal GND. The plurality of switch units 21 may, for example, include a ninth transistor T9 and a tenth transistor T10. The plurality of inductors L may, for example, include a third inductor L3 and a fourth inductor L4.

[0104] In this embodiment, the seventh transistor and the eighth transistor can play a role of stepping up and down in combination with the inductor, and can step up or down the voltage input by the power supply through the input end to power the display driving circuit through the output end. By changing the number of inductors connected to the step-up circuit through the switch circuit, the seventh transistor and the eighth transistor can adjust the inductance of the step-up and step-down circuit when stepping up or down the input voltage to power the display driving circuit, thereby improving the efficiency of the power supply circuit.

[0105] Exemplarily, the voltage conversion circuit 10 may further include an eighth capacitor C8 and a ninth capacitor C9. The first end of the eighth capacitor C8 is coupled to the input terminal VIN, and the second end of the eighth capacitor C8 is used to couple to the ground terminal GND. The first end of the ninth capacitor C9 is coupled to the first end of the third capacitor C3, and the second end of the ninth capacitor C9 is coupled to the second end of the third capacitor C3.

[0106] In one embodiment, each selection terminal of the selection switch in the switch circuit 20 is coupled to the first terminal of an inductor L, the fixed terminal of the selection switch is coupled to the input terminal VIN, and the second terminal of each inductor L is coupled to the output terminal VOUT.

[0107] In this embodiment, a selection switch is used to select a corresponding inductor to be coupled between the power supply and the display driving circuit, thereby reducing the complexity of the switch circuit structure and the complexity of the switch circuit control.

[0108] In one embodiment, each selection terminal of the selection switch in the switch circuit 20 is coupled to the first terminal of an inductor L, the fixed terminal of the selection switch is coupled to the output terminal VOUT, and the second terminal of each inductor L is coupled to the input terminal VIN.

[0109] In this embodiment, a selection switch is used to select a corresponding inductor to be coupled between the power supply and the display driving circuit, thereby reducing the complexity of the switch circuit structure and the complexity of the switch circuit control.

[0110] Exemplarily, when the voltage conversion circuit 10 includes a boost circuit, the fixed end of the selection switch is coupled to the input terminal VIN or the first end of the third transistor T3, and the second end of each inductor L is coupled to the first end of the third transistor T3 or the input terminal VIN. When the voltage conversion circuit 10 includes a buck circuit, the fixed end of the selection switch is coupled to the second end of the fifth transistor T5 or the output terminal VOUT, and the second end of each inductor L is coupled to the output terminal VOUT or the second end of the fifth transistor T5. When the voltage conversion circuit 10 includes a buck-boost circuit, the fixed end of the selection switch is coupled to the second end of the seventh transistor T7 or the ground terminal GND, and the second end of each inductor L is coupled to the ground terminal GND or the second end of the seventh transistor T7.

[0111] In one embodiment, if Fig.12 As shown, the power supply circuit further includes a control circuit 50. The control circuit 50 is coupled to the control end of the voltage conversion circuit 10 and the control end of the switch circuit 20. The control circuit 50 is used to control the voltage output by the voltage conversion circuit 10 and control the switch circuit 20 to switch on or off the corresponding inductor L.

[0112] In this embodiment, by coupling the control circuit to the control end of the voltage conversion circuit and the control end of the switching circuit, the control circuit can control the voltage conversion circuit and the switching circuit to change the number of inductors coupled between the power supply and the display driving circuit and adjust the voltage output by the voltage conversion circuit, thereby improving the efficiency and reliability of the power supply circuit.

[0113] Exemplarily, the control circuit 50 may be the control circuit 50 in the voltage conversion circuit 10, or may be a separate control circuit 50. The control circuit 50 may also be coupled between the voltage conversion circuit 10 and the display driving circuit 40, and control the on and off of the switch unit 21 in the switch circuit 20 according to the current output by the voltage conversion circuit 10.

[0114] For example, Figure 4 As shown, the control circuit 50 is coupled to the control terminals of the first transistor T1, the second transistor T2, the third transistor T3 and the fourth transistor T4. Figure 5 As shown, the control circuit 50 is coupled to the control terminals of the first transistor T1, the second transistor T2, the fifth transistor T5 and the sixth transistor T6. Figure 6 As shown, the control circuit 50 is coupled to the control terminals of the first transistor T1, the second transistor T2, the seventh transistor T7 and the eighth transistor T8. Fig. 9 As shown, the control circuit 50 is coupled to the control terminals of the third transistor T3, the fourth transistor T4, the ninth transistor T9 and the tenth transistor T10. Fig.10 As shown, the control circuit 50 is coupled to the control terminals of the fifth transistor T5, the sixth transistor T6, the ninth transistor T9 and the tenth transistor T10. Fig.11 As shown, the control circuit 50 is coupled to the control terminals of the seventh transistor T7 , the eighth transistor T8 , the ninth transistor T9 and the tenth transistor T10 .

[0115] Exemplarily, when the switch circuit 20 includes a selection switch, the control circuit 50 is coupled to a control terminal of the selection switch.

[0116] For example, Figures 3 to 11 As shown, the power supply circuit also includes a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, a sixth diode D6, a seventh diode D7, an eighth diode D8, a ninth diode D9 and a tenth diode D10. The first diode D1 is coupled in parallel with the first transistor T1. The second diode D2 is coupled in parallel with the second transistor T2. The third diode D3 is coupled in parallel with the third transistor T3. The fourth diode D4 is coupled in parallel with the fourth transistor T4. The fifth diode D5 is coupled in parallel with the fifth transistor T5. The sixth diode D6 is coupled in parallel with the sixth transistor T6. The seventh diode D7 is coupled in parallel with the seventh transistor T7. The eighth diode D8 is coupled in parallel with the eighth transistor T8. The ninth diode D9 is coupled in parallel with the ninth transistor T9. The tenth diode D10 is coupled in parallel with the tenth transistor T10. Wherein, each diode can be a body diode of a corresponding transistor.

[0117] By way of example, the inductor branch includes a first inductor branch and a second inductor branch, the plurality of inductors include a first inductor L1 and a second inductor L2, and the plurality of switch units include a first transistor T1 and a second transistor T2, and the manner of changing the number of inductors L in the power supply circuit is described. In the case where the voltage conversion circuit 10 includes a boost circuit, as shown in FIG. Fig.13 As shown, when the current I outputted from the power supply circuit to the display driving circuit 40 is less than 300mA, the greater the inductance value in the power supply circuit, the higher the efficiency of the power supply circuit. When the current I outputted from the power supply circuit to the display driving circuit 40 is greater than or equal to 300mA, the smaller the inductance value in the power supply circuit, the higher the efficiency of the power supply circuit. Curve S1 represents the efficiency of the power supply circuit when the inductance value in the power supply circuit is 4.7μH, and curve S2 represents the efficiency of the power supply circuit when the inductance value in the power supply circuit is 2.2μH. Figure 4 As shown, when the current I outputted from the power supply circuit to the display driving circuit 40 is less than 300 mA, the first transistor T1 is controlled to be turned on and the second transistor T2 is controlled to be turned off, so that the larger first inductor L1 is coupled between the power supply 30 and the display driving circuit 40. When the current I outputted from the power supply circuit to the display driving circuit 40 is greater than or equal to 300 mA, the second transistor T2 is controlled to be turned on and the first transistor T1 is controlled to be turned off, so that the smaller second inductor L2 is coupled between the power supply 30 and the display driving circuit 40.

[0118] In the case where the voltage conversion circuit 10 includes a step-down circuit, as shown in FIG. Fig.14 As shown, when the current I output by the power supply circuit to the display driving circuit 40 is less than 160mA, the greater the inductance value in the power supply circuit, the higher the efficiency of the power supply circuit. When the current I output by the power supply circuit to the display driving circuit 40 is between 160mA and 330mA, the inductance value in the power supply circuit is moderate, and the efficiency of the power supply circuit is higher. When the current I output by the power supply circuit to the display driving circuit 40 is greater than or equal to 330mA, the smaller the inductance value in the power supply circuit, the higher the efficiency of the power supply circuit. Among them, curve S1 represents the efficiency of the power supply circuit when the inductance value in the power supply circuit is 4.7μH, curve S2 represents the efficiency of the power supply circuit when the inductance value in the power supply circuit is 2.2μH, and curve S3 represents the efficiency of the power supply circuit when the inductance value in the power supply circuit is 1.5μH. As shown Figure 4As shown, when the current I outputted from the power supply circuit to the display driving circuit 40 is less than 160 mA, the first transistor T1 is controlled to be turned on and the second transistor T2 is controlled to be turned off, so that the larger first inductor L1 is coupled between the power supply 30 and the display driving circuit 40. When the current I outputted from the power supply circuit to the display driving circuit 40 is between 160 mA and 330 mA, the second transistor T2 is controlled to be turned on and the first transistor T1 is controlled to be turned off, so that the smaller second inductor L2 is coupled between the power supply 30 and the display driving circuit 40. When the current I outputted from the power supply circuit to the display driving circuit 40 is greater than or equal to 330 mA, the first transistor T1 and the second transistor T2 are controlled to be turned on.

[0119] In an exemplary embodiment, a power supply chip is provided. The power supply chip includes a power supply circuit.

[0120] In one embodiment, there are multiple power supply circuits, including a first power supply circuit, a second power supply circuit and a third power supply circuit, wherein the first power supply circuit and the second power supply circuit include a boost circuit, and the third power supply circuit includes a buck-boost circuit.

[0121] In this embodiment, since the display driving circuit requires at least three power supplies when in operation, the power supply chip includes a first power supply circuit, a second power supply circuit, and a third power supply circuit. Since the three power supply circuits can output different voltages to the display driving circuit respectively, the display driving chip can operate reliably, thereby improving the reliability of the power supply chip. At the same time, since the inductance in each power supply circuit can be adjusted, the efficiency of the power supply chip can be greatly improved, thereby extending the battery life of the electronic device.

[0122] Exemplarily, the first power supply circuit may output a voltage ELVDD to the display driving circuit, the second power supply circuit may output a voltage AVDD to the display driving circuit, and the third power supply circuit may output a voltage ELVSS to the display driving circuit.

[0123] In an exemplary embodiment, an electronic device is provided, and the electronic device is, for example, a mobile phone, a laptop computer, a tablet computer, a wearable device, etc. The electronic device includes the power supply chip as described above.

[0124] refer to Fig.15 As shown, electronic device 400 may include one or more of the following components: a processing component 402 , a memory 404 , a power component 406 , a multimedia component 408 , an audio component 410 , an input / output (I / O) interface 412 , a sensor component 414 , and a communication component 416 .

[0125] The processing component 402 generally controls the overall operation of the electronic device 400, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 402 may include one or more processors 420 to execute instructions to complete all or part of the steps of the above-mentioned method. In addition, the processing component 402 may include one or more modules to facilitate the interaction between the processing component 402 and other components. For example, the processing component 402 may include a multimedia module to facilitate the interaction between the multimedia component 408 and the processing component 402.

[0126] The memory 404 is configured to store various types of data to support operations on the electronic device 400. Examples of such data include instructions for any application or method operating on the electronic device 400, contact data, phone book data, messages, pictures, videos, etc. The memory 404 can be implemented by any type of volatile or non-volatile storage terminal or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0127] The power supply component 406 provides power to the various components of the electronic device 400. The power supply component 406 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the electronic device 400.

[0128] The multimedia component 408 includes a screen that provides an output interface between the electronic device 400 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 408 includes a front camera module and / or a rear camera module. When the electronic device 400 is in an operating mode, such as a shooting mode or a video mode, the front camera module and / or the rear camera module may receive external multimedia data. Each front camera module and the rear camera module may be a fixed optical lens system or have a focal length and optical zoom capability.

[0129] The audio component 410 is configured to output and / or input audio signals. For example, the audio component 410 includes a microphone (MIC), and when the electronic device 400 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 404 or sent via the communication component 416. In some embodiments, the audio component 410 also includes a speaker for outputting audio signals.

[0130] I / O interface 412 provides an interface between processing component 402 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: a home button, a volume button, a start button, and a lock button.

[0131] The sensor assembly 414 includes one or more sensors for providing various aspects of status assessment for the electronic device 400. For example, the sensor assembly 414 can detect the open / closed state of the electronic device 400, the relative positioning of components, such as the display and keypad of the electronic device 400, and the sensor assembly 414 can also detect the position change of the electronic device 400 or a component of the electronic device 400, the presence or absence of user contact with the electronic device 400, the orientation or acceleration / deceleration of the electronic device 400, and the temperature change of the electronic device 400. The sensor assembly 414 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 414 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 414 may also include an accelerometer, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0132] The communication component 416 is configured to facilitate wired or wireless communication between the electronic device 400 and other terminals. The electronic device 400 can access a wireless network based on a communication standard, such as WiFi, 2G, 3G, 4G, 5G, or a combination thereof. In an exemplary embodiment, the communication component 416 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 416 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0133] In an exemplary embodiment, the electronic device 400 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing terminals (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components.

[0134] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are indicated by the claims.

[0135] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0136] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A power supply circuit, characterized in that: The power supply circuit comprises: A voltage conversion circuit, the voltage conversion circuit comprising an input end, an output end and a plurality of inductors, the input end being used to couple with a power supply, the output end being used to couple with a display driving circuit, the voltage conversion circuit being used to convert the voltage of the power supply and output it to the display driving circuit to supply power to the display driving circuit; A switch circuit is coupled to at least one of the inductors, the switch circuit is coupled to the inductor in a one-end coupling or a two-end coupling manner, and the switch circuit is coupled between the input end and the output end, and the switch circuit is used to control the coupled inductor to be turned on or off between the power supply and the display driving circuit.

2. The power supply circuit according to claim 1, characterized in that: The voltage conversion circuit includes a plurality of inductance branches coupled in parallel, and each of the inductance branches is coupled between the input end and the output end, and each of the inductance branches is located in one of the inductance branches; the switching circuit includes at least one switching unit, each of the switching units is arranged in one of the inductance branches, and different switching units are located in different inductance branches, and the switching unit is coupled in series with the inductance in the inductance branch where it is located.

3. The power supply circuit according to claim 2, characterized in that: There are multiple switch units, and each of the inductor branches includes one switch unit and one inductor.

4. The power supply circuit according to claim 3, characterized in that: The multiple inductors include a first inductor and a second inductor, and the multiple switch units include a first transistor and a second transistor; the first inductor is coupled in series with the first transistor to form a first inductor branch in the inductor branch, and the second inductor is coupled in series with the second transistor to form a second inductor branch in the inductor branch.

5. The power supply circuit according to claim 2, characterized in that: The voltage conversion circuit includes a boost circuit; or, the voltage conversion circuit includes a buck circuit; or, the voltage conversion circuit includes a buck-boost circuit.

6. The power supply circuit according to claim 5, characterized in that: The voltage conversion circuit comprises: a third transistor, wherein a first end of the third transistor is coupled to the first end of each of the inductor branches, and a second end of the third transistor is used to couple to a ground end; a fourth transistor, wherein a first terminal of the fourth transistor is coupled to the first terminal of the third transistor, and a second terminal of the fourth transistor is coupled to the output terminal; a first capacitor, wherein a first end of the first capacitor is coupled to the second end of the fourth transistor, and a second end of the first capacitor is used to couple to the ground end; Wherein, the second end of each of the inductor branches is coupled to the input end.

7. The power supply circuit according to claim 5, characterized in that: The voltage conversion circuit comprises: a fifth transistor, wherein a first terminal of the fifth transistor is coupled to the input terminal, and a second terminal of the fifth transistor is coupled to the first terminal of each of the inductor branches; a sixth transistor, a first terminal of the sixth transistor being coupled to the second terminal of the fifth transistor, and a second terminal of the sixth transistor being coupled to a ground terminal; A second capacitor, wherein a first end of the second capacitor is coupled to the second end of each of the inductor branches and the output end, and a second end of the second capacitor is used to couple to the ground end.

8. The power supply circuit according to claim 5, characterized in that: The voltage conversion circuit comprises: a seventh transistor, wherein a first terminal of the seventh transistor is coupled to the input terminal, and a second terminal of the seventh transistor is coupled to the first terminal of each of the inductor branches; an eighth transistor, a first terminal of the eighth transistor being coupled to the second terminal of the seventh transistor, and a second terminal of the eighth transistor being coupled to the output terminal; A third capacitor, wherein a first end of the third capacitor is coupled to the second end of the eighth transistor, and a second end of the third capacitor is coupled to the second end of each of the inductor branches and a ground end.

9. The power supply circuit according to claim 1, characterized in that: Each of the inductors is coupled in series between the input end and the output end; the switch circuit includes at least one switch unit, each of the switch units is coupled in parallel with one of the inductors, and different switch units are coupled with different inductors.

10. The power supply circuit according to claim 9, characterized in that: The number of the switch units is the same as the number of the inductors; each of the switch units is coupled in parallel with one of the inductors.

11. The power supply circuit according to claim 1, characterized in that: Each selection end of the selection switch in the switching circuit is coupled to the first end of one of the inductors, the fixed end of the selection switch is coupled to the input end, and the second end of each of the inductors is coupled to the output end; or, each selection end of the selection switch in the switching circuit is coupled to the first end of one of the inductors, the fixed end of the selection switch is coupled to the output end, and the second end of each of the inductors is coupled to the input end.

12. The power supply circuit according to any one of claims 1 to 11, characterized in that: The power supply circuit also includes: A control circuit is coupled to a control end of the voltage conversion circuit and a control end of the switch circuit.

13. A power supply chip, characterized in that: The power supply chip comprises the power supply circuit according to any one of claims 1 to 12.

14. The power supply chip according to claim 13, characterized in that: There are multiple power supply circuits; the multiple power supply circuits include a first power supply circuit, a second power supply circuit and a third power supply circuit, the first power supply circuit and the second power supply circuit include a boost circuit, and the third power supply circuit includes a buck-boost circuit.

15. An electronic device, characterized in that: The electronic device comprises the power supply chip according to claim 13 or 14.

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